Gap, won't have to tune the gas block for your can, less moving parts, easier to shoot accurately etc...plus will be cheaper depending on the model nemo...
Same boat here minus the 338, im shooting a 6.5. Ive been to the oakridge range, its nice but the big range is only open for practice (members only) or comps. Farthest I have here local is 100 and well.........it sucks.